| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdds.fs; |
| |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.util.Shell; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| import static org.apache.hadoop.ozone.OzoneConsts.KB; |
| import static org.apache.hadoop.test.GenericTestUtils.getTestDir; |
| import static org.junit.jupiter.api.Assertions.assertTrue; |
| import static org.junit.jupiter.api.Assumptions.assumeFalse; |
| import static org.junit.jupiter.api.Assumptions.assumeTrue; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.util.Random; |
| |
| /** |
| * Tests for {@link DU}. |
| */ |
| public class TestDU { |
| |
| private static final File DIR = getTestDir(TestDU.class.getSimpleName()); |
| |
| @Before |
| public void setUp() { |
| assumeFalse(Shell.WINDOWS); |
| FileUtil.fullyDelete(DIR); |
| assertTrue(DIR.mkdirs()); |
| } |
| |
| @After |
| public void tearDown() throws IOException { |
| FileUtil.fullyDelete(DIR); |
| } |
| |
| static void createFile(File newFile, int size) throws IOException { |
| // write random data so that filesystems with compression enabled (e.g. ZFS) |
| // can't compress the file |
| Random random = new Random(); |
| byte[] data = new byte[size]; |
| random.nextBytes(data); |
| |
| assumeTrue(newFile.createNewFile()); |
| RandomAccessFile file = new RandomAccessFile(newFile, "rws"); |
| |
| file.write(data); |
| |
| file.getFD().sync(); |
| file.close(); |
| } |
| |
| /** |
| * Verify that du returns expected used space for a file. |
| * We assume here that if a file system crates a file of size |
| * that is a multiple of the block size in this file system, |
| * then the used size for the file will be exactly that size. |
| * This is true for most file systems. |
| */ |
| @Test |
| public void testGetUsed() throws Exception { |
| final long writtenSize = 32 * KB; |
| File file = new File(DIR, "data"); |
| createFile(file, (int) writtenSize); |
| |
| SpaceUsageSource du = new DU(file); |
| long duSize = du.getUsedSpace(); |
| |
| assertFileSize(writtenSize, duSize); |
| } |
| |
| @Test |
| public void testExcludePattern() throws IOException { |
| createFile(new File(DIR, "include.txt"), (int) (4 * KB)); |
| createFile(new File(DIR, "exclude.tmp"), (int) (100 * KB)); |
| SpaceUsageSource du = new DU(DIR, "*.tmp"); |
| |
| long usedSpace = du.getUsedSpace(); |
| |
| assertFileSize(4*KB, usedSpace); |
| } |
| |
| private static void assertFileSize(long expected, long actual) { |
| // Allow for extra 8K on-disk slack for local file systems |
| // that may store additional file metadata (eg ext attrs). |
| final long max = expected + 8 * KB; |
| assertTrue(expected <= actual && actual <= max, () -> |
| String.format( |
| "Invalid on-disk size: %d, expected to be in [%d, %d]", |
| actual, expected, max)); |
| } |
| |
| } |